Topic
Chemisorption
About: Chemisorption is a research topic. Over the lifetime, 16298 publications have been published within this topic receiving 554989 citations.
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TL;DR: The chemisorption of water on Si(100) 2 × 1 and the Si(111) 7 × 7 surface has been studied between 160 and 420 K using electron energy loss spectroscopy as mentioned in this paper.
230 citations
TL;DR: Structural changes that are strongly dependent on the pretreatment method have now been observed for an industrial-type methanol synthesis catalyst and a combination of chemisorption, reaction, and spectroscopic techniques provides a consistent picture of surface alloying between copper and zinc.
Abstract: Methanol has recently attracted renewed interest because of its potential importance as a solar fuel.1 Methanol is also an important bulk chemical that is most efficiently formed over the industrial Cu/ZnO/Al2O3 catalyst. The identity of the active site and, in particular, the role of ZnO as a promoter for this type of catalyst is still under intense debate.2 Structural changes that are strongly dependent on the pretreatment method have now been observed for an industrial-type methanol synthesis catalyst. A combination of chemisorption, reaction, and spectroscopic techniques provides a consistent picture of surface alloying between copper and zinc. This analysis enables a reinterpretation of the methods that have been used for the determination of the Cu surface area and provides an opportunity to independently quantify the specific Cu and Zn areas. This method may also be applied to other systems where metal–support interactions are important, and this work generally addresses the role of the carrier and the nature of the interactions between carrier and metal in heterogeneous catalysts.
229 citations
TL;DR: In this article, the pore surface of SBA-15 mesoporous silica with different amounts of branched polyethyleneimine (PEI) was impregnated with different sizes of PEI.
228 citations
TL;DR: In this paper, the surface area and hydrogen chemisorption measurements made on palladium-black samples were used to determine surface areas of particles of a size where other techniques, such as electron microscopy, X-ray linebroadening and small-angle scattering, often fail through interference of the support.
228 citations
TL;DR: Per-formed ab-initio total energy calculations show that a chemisorption reaction involving areconstruction to form a (111) hydroxyl surface is strongly preferred with ∆E = −90.2 kJ mol.
Abstract: The observed reactivity of MgO with water is in apparent conflict with theoretical calculations which show that molecular dissociation does not occur on a perfect (001) surface. We have performed ab initio total-energy calculations which show that a chemisorption reaction involving a reconstruction to form a (111) hydroxyl surface is strongly preferred with \ensuremath{\Delta}E=-90.2 kJ ${\mathrm{mol}}^{\mathrm{\ensuremath{-}}1}$. We conclude that protonation stabilizes the otherwise unstable (111) surface and that this, not the bare (001), is the most stable surface of MgO under ambient conditions.
228 citations